A case of severe juvenile rheumatoid arthritis, polyarticular type, refractory to FANS and long acting therapy which showed a quick remission after measles is described. An immunosuppressive therapy to strengthen the immunosuppression induced by virus infection was performed for six months. The remission has been maintained for 4 years and appears up to now to be stable with no therapy. On the basis of this observation, the possibility of a vaccination therapy with measles virus, which equally gives immunosuppression, is discussed.